參數(shù)資料
型號(hào): AD9148BBCZ
廠商: Analog Devices Inc
文件頁(yè)數(shù): 62/72頁(yè)
文件大小: 0K
描述: IC DAC 16BIT QD 1GSPS 196CSPBGA
標(biāo)準(zhǔn)包裝: 1
系列: TxDAC+®
設(shè)置時(shí)間: 20ns
位數(shù): 16
數(shù)據(jù)接口: 串行,SPI?
轉(zhuǎn)換器數(shù)目: 4
電壓電源: 模擬和數(shù)字
功率耗散(最大): 2.22W
工作溫度: -40°C ~ 85°C
安裝類(lèi)型: 表面貼裝
封裝/外殼: 196-LFBGA,CSPBGA
供應(yīng)商設(shè)備封裝: 196-CSPBGA(12x12)
包裝: 托盤(pán)
輸出數(shù)目和類(lèi)型: 8 電流,單極
采樣率(每秒): *
Data Sheet
AD9148
Rev. B | Page 65 of 72
TEMPERATURE SENSOR
The AD9148 has a diode-based temperature sensor for measuring
the temperature of the die. The temperature reading is accessed
by Register 0x5E and Register 0x5F. The temperature of the die
can be calculated as
130
)
700
,
13
]
0
:
15
[
(
= DieTemp
TDIE
where TDIE is the die temperature in degrees Celsius. The
temperature accuracy is ±5°C typical over the +85°C to
35°C range. A typical plot of the AD9148 die temperature
vs. die temperature code readback is shown in Figure 90.
7,500
–40 –30 –20 –10
0
10
20
30
40
50
60
70
80
90 100
10,000
12,500
15,000
17,500
20,000
22,500
25,000
27,500
TEMPERATURE (°C)
DI
E
CO
DE
RE
ADBACK
MEASURED DIE TEMPERATURE
CALCULATED DIE TEMPERATURE
+5°C
–5°C
08910-
189
Figure 90. Die Temperature vs. Die Temperature Code Readback
Estimates of the ambient temperature can be made if the power
dissipation of the device is known. For example, if the device power
dissipation is 800 mW and the measured die temperature is 50°C,
then the ambient temperature can be calculated as
TA = TDIE – PD × TJA = 50 – 0.8 × 18 = 35.6°C
where:
TA is the ambient temperature in degrees Celsius.
TJA is the thermal resistance from junction to ambient of the
To use the temperature sensor, it must be enabled by setting
Bit 0, Register 0x5C to 0. Before the temperature sensor data
can be read back, it must be latched by toggling Bit 1, Register 0x5C
from 0 to 1. In addition, to get accurate readings, the die temperature
control register (Register 0x5D) should be set to 0x0A.
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